#用来存储功能的内容
#自定义过滤器，实现热门新闻颜色提示：
from flask import current_app
from flask import g
from flask import session

from functools import wraps


def do_index_class(index):
    if index ==1:
        return "first"
    elif index ==2:
        return "second"
    elif index ==3:
        return "third"
    else:
        return  ''

#装饰器
def user_login_data(view_func):
    @wraps(view_func)
    def wrapper(*args,**kwargs):
        # 获取用户编号
        user_id = session.get('user_id')
        # 查询用户对象
        user = None
        if user_id:
            try:
                from info.models import User
                user = User.query.get(user_id)
            except Exception as e:
                current_app.logger.error(e)
        #保存用户对象到g
        g.user=user
        return view_func(*args,**kwargs)
    return wrapper
